def __init__(self, opts):
'''expects one dictionary full of params.
opts should have these fields:
name : visual identified of resource
creator : process that created this resource
'''
self.rid = kernel_data.RID
kernel_data.RID += 1
self.name = opts['name']
self.creator = opts['creator']
self.awaiting_processes = ProcessQueue()
class Resource:
def __init__(self, opts):
'''expects one dictionary full of params.
opts should have these fields:
name : visual identified of resource
creator : process that created this resource
'''
self.rid = kernel_data.RID
kernel_data.RID += 1
self.name = opts['name']
self.creator = opts['creator']
self.awaiting_processes = ProcessQueue()
# Resurso planuotojas
def distribute(self):
''' Algorithm that distributes resource. (Resurso planuotojas) '''
logger.log("DISTRIBUTOR called on: " + self.name)
if self.free():
logger.log("GOT TRUE")
pr = self.awaiting_processes.get()
# if there are processes waiting for this resource
# give resource to them
if pr is not None:
pr.used_resources.add(self)
pr.make_ready()
self.awaiting_processes.remove(pr)
# lock_with_semaphore when asking_for_resoure
# if resource is guarded with semaphore create lock
if hasattr(self, 'sem'):
self.sem.v()
logger.log("LOCKED SEMAPHORE on " + self.name)
else:
kernel_data.ACTIVE_PROCESS.state = BLOCKED_STATE
self.awaiting_processes.add(kernel_data.ACTIVE_PROCESS)
logger.log("GOT FALSE")
kernel.schedule()
def free(self):
''' returns True if is freed and false otherwise '''
return True
class Resource:
def __init__(self, opts):
'''expects one dictionary full of params.
opts should have these fields:
name : visual identified of resource
creator : process that created this resource
'''
self.rid = kernel_data.RID
kernel_data.RID += 1
self.name = opts['name']
self.creator = opts['creator']
self.awaiting_processes = ProcessQueue()
# Resurso planuotojas
def distribute(self):
''' Algorithm that distributes resource. (Resurso planuotojas) '''
logger.log("DISTRIBUTOR called on: " + self.name)
if self.free():
logger.log("GOT TRUE")
pr = self.awaiting_processes.get()
# if there are processes waiting for this resource
# give resource to them
if pr is not None:
pr.used_resources.add(self)
pr.make_ready()
self.awaiting_processes.remove(pr)
# lock_with_semaphore when asking_for_resoure
# if resource is guarded with semaphore create lock
if hasattr(self, 'sem'):
self.sem.v()
logger.log("LOCKED SEMAPHORE on " + self.name)
else:
kernel_data.ACTIVE_PROCESS.state = BLOCKED_STATE
self.awaiting_processes.add(kernel_data.ACTIVE_PROCESS)
logger.log("GOT FALSE")
kernel.schedule()
def free(self):
''' returns True if is freed and false otherwise '''
return True
def __init__(self, opts):
'''expects one dictionary full of params.
opts should have these fields:
name : visual identified of resource
creator : process that created this resource
'''
self.rid = kernel_data.RID
kernel_data.RID += 1
self.name = opts['name']
self.creator = opts['creator']
self.awaiting_processes = ProcessQueue()
